Packer with electrical conduit bypass

Abstract

A packer for a subterranean well conduit providing an electrical conduit bypass comprises a top sub having a first eccentric bore connectable between a tubing string and a mandrel and a second eccentric passage sealingly receiving an electrical conduit. A tubular body assembly is shearably connected to the top sub and mounts an annular packing element, an annular cylinder and piston unit and an annular slip and cone assemblage in axially stacked, abutting relationship. A support block secured to the lower end of the mandrel supports the electrical conduit and secures the lower cone against relative movement so that extension of said cylinder and piston effects setting of the packer. Upward movement of the top sub effects unsetting and retrieval of the packer.

What is claimed and desired to be secured by Letters Patent is: 
     
       1. A packer for a subterranean well conduit providing an electrical conduit bypass through the packer comprising, in combination: a top sub having a cylindrical exterior configuration and defining a plurality of eccentrically disposed longitudinal passages; one said passage having upper and lower ends and having means at its upper end for connection to a tubing string; another of said passages being designed to accommodate an electrical conduit; means for sealingly inserting said electrical conduit through said another of said passages; a tubular packer body assemblage; shearable means for securing the upper end of said tubular body assemblage to the bottom end of said top sub; annular packing means surrounding one part of said tubular body assemblage; an abutment ring secured to said tubular body assemblage adjacent one axial end of said annular packing means; said packing means being expandable into sealing engagement with the well conduit bore by axial compression thereof against said abutment ring; a plurality of peripherally spaced slip elements surrounding another part of said tubular body assemblage; axially shiftable upper and lower cone elements cooperable with said slip elements to expand same into engagement with the well conduit bore; a cylinder sleeve cooperable with said tubular body assemblage to define an annular fluid pressure chamber; an annular piston cooperating with said annular fluid pressure chamber; port means in said top sub and said tubular packer body assemblage for supplying pressured fluid from the tubing string to said annular fluid pressure chamber; means operatively connecting said cylinder sleeve and said annular piston to said packing means and said upper cone element to packoff the packer in the well conduit; a hollow mandrel secured to the bottom end of said one of said passages and extending downwardly through said tubular body assemblage; an upper cylindrical support ring mounted in the bore of said tubular packer body assemblage; said upper support ring having eccentric passages to receive said mandrel and the electrical conduit therein; a lower cylindrical support ring; means for securing said lower support ring to said mandrel adjacent to and concentric with said lower cone element; said support ring defining an eccentric passage to accommodate an extension of the electric conduit, whereby only said top sub and said cylindrical support rings have to be revised to accommodate any selected sizes of said mandrel and the electrical conduit. 
     
     
       2. The apparatus of claim 1 wherein the bottom end of said packer tubular body assemblage comprises a collet having a plurality of peripherally spaced locking heads abutting the cylindrical periphery of said support ring; and recessed means secured to said lower cone element lockingly receiving said collet heads, thereby securing said lower cone element to said tubular body assemblage until said top sub and said mandrel are elevated relative to said tubular body assemblage. 
     
     
       3. The apparatus of claim 1 or 2 further comprising an interlocking means disposed in locking relation between said cylinder sleeve and said annular piston to secure same in an inactive position relative to said annular packing means and said upper cone element during run-in, said interlocking means being releasable by initial movement of said annular piston produced in response to introduction of said pressured fluid into said fluid pressure chamber, thereby driving said cylinder sleeve and said annular piston in opposite directions to an extended position wherein said packing means and said slip elements are expanded into engagement with the well conduit. 
     
     
       4. The apparatus of claim 1 or 2 further comprising an interlocking means disposed in locking relation between said cylinder sleeve and said annular piston to secure same in an inactive position relative to said annular packing means said upper cone element during run-in, said interlocking means being releasable by initial movement of said annular piston produced in response to introduction of said pressured fluid into said fluid pressure chamber, thereby driving said cylinder sleeve and said annular piston in opposite directions to an extended position wherein said packing means and said slip elements are expanded into engagement with the well conduit; and body lock ring means for securing said cylinder sleeve and annular piston in said extended position. 
     
     
       5. The packer of claim 1 further comprising a downwardly facing shoulder formed in said packer tubular body assemblage and engagable by said lower cylindrical support ring by further upward movement of said mandrel, thereby removing said tubular body assemblage and all of the aforesaid elements mounted thereon from the well conduit after shearing said shearable means. 
     
     
       6. The packer of claim 5 further comprising fluid pressure operated means for locking said top sub to said tubular body assemblage, said fluid pressure operated means being biased to a locking position by a higher fluid pressure inside said top sub than the pressure in the well conduit bore; and resilient means urging said fluid pressure operated means to an unlocked position. 
     
     
       7. The packer of claim 1, 5 or 6 wherein said tubular packer assemblage comprises upper and lower tubular bodies; and a connecting sleeve threadably interconnecting said upper and lower tubular bodies and securing said upper support ring intermediate thereto. 
     
     
       8. The packer of claim 5 or 6 wherein said tubular packer assemblage comprises upper and lower tubular bodies; and a connecting sleeve threadably interconnecting said upper and lower tubular bodies and securing said upper support ring intermediate thereto; a portion of said fluid pressure chamber overlying said connecting sleeve; and said port means comprises a radial port in said one passage, an axially extending pipe mounted in said top sub and said upper support ring and radial ports in said connecting sleeve and upper support ring communicating with said pipe.